JP5882818B2 - Electronics - Google Patents

Description

  The present invention relates to a structure for cooling a power circuit board included in an electronic device.

  The electronic device disclosed in Patent Document 1 includes a case that is disposed in a housing of the electronic device and accommodates a power circuit board. An intake hole is formed in the front wall of the case, and an exhaust port is formed in the rear wall of the case. The air sent out from the cooling fan is taken into the inside of the case through the intake hole, and is discharged outside through the exhaust port of the case. The exhaust port is provided with a louver for preventing the power circuit board from being exposed through the exhaust port.

US Patent Application Publication No. 2010/0254086

  In order to efficiently cool the power circuit board, it is desirable that the ventilation efficiency of the case, that is, the exhaust efficiency and the intake efficiency are higher.

  The objective of this invention is providing the electronic device which can improve the ventilation efficiency of the air which flows through the inside of the case which accommodates a power supply circuit board.

  An electronic device according to the present invention is provided in a case that houses a power supply circuit board, a vent formed in the case and opening in a first direction toward the outside of the case, and the vent Arranged in a second direction intersecting the first direction with an interval, each inclined with respect to the first direction and inclined toward one side of the second direction toward the outside of the case. A plurality of louvers, a first edge located on one side in the second direction, which is a part of an edge of the vent, and one of the plurality of louvers in the second direction. A louver located at an end, located on the inner side of the case than the first edge of the vent, and separated from the first edge of the vent in the first direction A first end louver and air flow in the case And formed on one side in the second direction with respect to the first end louver and passing between the first edge of the vent and the first end louver. And a first air flow path communicating with the outside of the case. According to this electronic device, the ventilation efficiency of the air flowing through the case can be improved. Further, since the first end louver is located in the first direction, which is the direction in which the vent is opened, with respect to the first edge of the vent, the first louver and the first edge of the vent As a result, it is possible to prevent the power circuit board from being exposed through the vent.

It is a top view of the electronic device which concerns on embodiment of this invention. It is sectional drawing in the II-II line | wire shown in FIG. It is a rear view of an electronic device. It is a disassembled perspective view of the power supply unit with which an electronic device is provided. It is a perspective view of a power supply unit. It is sectional drawing which shows the principal part of FIG. It is a top view which shows the principal part of a lower housing.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an electronic apparatus 1 according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II shown in FIG. FIG. 3 is a rear view of the electronic apparatus 1. FIG. 4 is an exploded perspective view of the power supply unit 10 provided in the electronic apparatus 1. FIG. 5 is a perspective view of the power supply unit 10. 6 is a cross-sectional view showing a main part of FIG. In the following description, X1 and X2 shown in these drawings are the left direction and the right direction, respectively, Y1 and Y2 are the front and rear, respectively, and Z1 and Z2 are the upper and lower directions, respectively.

  The electronic device 1 is an entertainment device that executes a program stored in a recording medium such as an optical disk and reproduces moving image data stored in the recording medium. As shown in FIG. 1, the electronic device 1 includes a cooling unit 50 and a power supply unit 10. The electronic device 1 also includes a recording medium reading device (for example, a disk drive, not shown). The electronic device 1 has a housing 60 that accommodates these devices. As shown in FIG. 2, the housing 60 in this example includes an upper housing 61 that covers the upper side of these devices, and a lower housing 62 that is disposed on the lower side of these devices. The upper housing 61 and the lower housing 62 are combined in the vertical direction. A circuit board 3 on which electronic components such as an integrated circuit (not shown) for controlling the electronic device 1 are mounted is disposed below the housing 60. The upper surface of the circuit board 3 is covered with an upper chassis 2 that is a metal plate. The upper chassis 2 is attached to the upper surface of the circuit board 3. The cooling unit 50 and the power supply unit 10 are disposed on the upper chassis 2. In addition, the electronic apparatus 1 of this example includes a lower chassis 4 that covers the lower surface of the circuit board 3. The lower chassis 4 is also attached to the circuit board 3.

  As shown in FIG. 2, the cooling unit 50 has a cooling fan 51. The cooling fan 51 is arranged so that the rotation center line C <b> 1 is perpendicular to the circuit board 3. The bottom of the cooling fan 51 is attached to the upper chassis 2. The cooling fan 51 has a plurality of fins 51a. The cooling unit 50 has a heat sink. The cooling unit 50 in this example includes a first heat sink 52 and a second heat sink 53 arranged side by side as shown in FIG. The heat sinks 52 and 53 are arranged in the radial direction of the cooling fan 51. In this example, the first heat sink 52 is disposed behind the cooling fan 51, and the second heat sink 53 is positioned rearward and rightward with respect to the cooling fan 51. The heat sinks 52 and 53 are heat sinks for cooling the integrated circuit mounted on the circuit board 3. The first heat sink 52 in this example is connected to the integrated circuit through the heat pipe 13 (see FIG. 2).

  As shown in FIG. 2, the cooling unit 50 includes a cover 54 that covers the cooling fan 51 and the heat sinks 52 and 53. An air flow path from the cooling fan 51 to the heat sinks 52 and 53 is defined by the cover 54. Specifically, the cover 54 is formed with an opening 54 a located above the cooling fan 51. The upper chassis 2 in which the cooling fan 51 is disposed is formed with a plurality of ventilation holes 2 a located below the cooling fan 51. When the cooling fan 51 rotates, air is sucked toward the cooling fan 51 through the opening 54a and the vent hole 2a, and is sent out from the cooling fan 51 in the radial direction. The cover 54 has a wall portion that surrounds the cooling fan 51 and the heat sinks 52, 53, and a flow path for the air exiting from the cooling fan 51 is formed inside the cover 54. 1 and 2, F <b> 1 indicates an example of an air flow formed in the cover 54. As shown in FIGS. 1 and 2, the cover 54 of this example has a wall portion 54 b that is curved along the outer periphery of the cooling fan 51 on the front side thereof, and is provided between the wall portion 54 b and the cooling fan 51. In addition, an air flow path S <b> 1 is formed along the outer periphery of the cooling fan 51. The air flowing through the air flow path S <b> 1 is sent to the second heat sink 53. Further, an air flow that flows backward from the cooling fan 51 is formed inside the cover 54. This air flow is sent to the heat sinks 52 and 53 without passing through the air flow path S1.

  As shown in FIGS. 2 and 3, the power supply unit 10 has a power supply circuit board 11 (in these drawings, electronic components constituting the power supply circuit are omitted). A power supply inlet 12 connected to an external power supply is connected to the power supply circuit board 11 (see FIG. 4). The power circuit board 11 generates operating voltages of various devices and circuits included in the electronic device 1 from an external power source. As shown in FIG. 2, the power supply unit 10 has a case 20 that houses the power supply circuit board 11. The case 20 is connected to the cover 54. Specifically, the cover 54 opens toward the case 20. In this example, the cover 54 opens rearward. The case 20 has a box shape in which an opening having a size corresponding to the cover 54 is formed. The rear edge (opening edge) 54c of the cover 54 and the opening edge 20e formed in the case 20 are connected. The case 20 in this example has a larger width in the left-right direction than the cover 54 (see FIG. 1). Therefore, the opening of the case 20 connected to the cover 54 is formed in a part of the front wall of the case 20. Inside the case 20, air flow paths S <b> 2 and S <b> 3 are formed following the air flow path formed by the cover 54.

  As shown in FIG. 2, the case 20 is formed with an exhaust port 21 (a vent port in the claims) in the front-rear direction opened toward the outside of the case 20. The exhaust port 21 is formed in the wall portion of the case 20 located on the side opposite to the cover 54. In this example, the exhaust port 21 is formed in the rear wall of the case 20 and opens toward the rear side of the case 20. The exhaust port 21 in this example is formed in almost the entire rear wall of the case 20 and has a rectangular shape elongated in the left-right direction (see FIGS. 3 and 5). The width of the exhaust port 21 in the left-right direction is larger than the width W4 of the opening at the rear end of the cover 54 (see FIG. 1). Therefore, the air flow F2 in the case 20 spreads in the left-right direction as shown in FIG. Thereby, air can be allowed to pass through the entire power circuit board 11.

  As shown in FIG. 2, the case 20 is accommodated in the housing 60. An opening 60 b having a size corresponding to the exhaust port 21 is formed in the rear wall of the housing 60. The peripheral edge of the exhaust port 21 is fitted inside the opening 60b (the peripheral edge of the exhaust port 21 is the entire lower edge 21a, upper edge 21b, and side edge 21c shown in FIG. 5). Therefore, the discharge of air from the exhaust port 21 means that the air is discharged from the housing 60. With such a structure, the exhaust efficiency of air is improved. The upper housing 61 and the lower housing 62 are formed with recesses 61a and 62a facing each other (see FIG. 3). The recesses 61a and 62a constitute an opening 60b into which the periphery of the exhaust port 21 is fitted. Yes.

  As shown in FIG. 6, the exhaust port 21 is provided with a plurality of louvers 22. The plurality of louvers 22 are arranged at intervals in a direction that intersects the direction in which the exhaust port 21 is opened (the front-rear direction in this example). In this example, the louvers 22 are arranged in a direction orthogonal to the front-rear direction. Specifically, the louvers 22 are lined up and down. The plurality of louvers 22 include a lower end louver 22A and an upper end louver 22B, which will be described later. In the following description, reference numeral 22A is used when specifically referring to the lower end louver, and reference numeral 22 is also used for the lower end louver in other cases. Similarly, reference numeral 22B is used when specifically referring to the upper louver, and reference numeral 22 is also used for the upper louver in other cases.

  As shown in FIG. 6, each louver 22 is inclined with respect to the front-rear direction. Specifically, each louver 22 is inclined downward toward the rear side of the case 20. The louver 22 has two edges 22a and 22b located on opposite sides in the front-rear direction. One edge 22a (hereinafter referred to as an inner edge) is located inward of the case 20 relative to the other edge 22b (hereinafter referred to as an outer edge 22b). Due to the inclination of the louver 22, the outer edge 22b is positioned below the inner edge 22a. By such an inclination of the louver 22, it is possible to prevent the power supply circuit board 11 from being exposed through the exhaust port 21. Note that the direction in which the louver 22 is tilted is not limited to the form described above. For example, the louver 22 may be inclined such that the outer edge 22b is positioned above the inner edge 22a.

  Two louvers 22 adjacent in the up-down direction are arranged so as to partially overlap in the front-rear direction. In this example, as shown in FIG. 6, the straight line L <b> 3 along the front-rear direction passing through the outer edge 22 b of one of the two louvers 22 passes through the inner edge 22 a of the other louver 22. Thereby, it is possible to effectively suppress the power circuit board 11 from being exposed through the exhaust port 21.

  As shown in FIG. 6, the plurality of louvers 22 have a lower end louver 22A as one of them. The lower end louver 22 </ b> A is a louver positioned at the lower ends of the plurality of louvers 22. The lower end louver 22A is located on the inner side of the case 20 with respect to the lower portion (that is, the lower edge 21a) of the periphery of the exhaust port 21, and is separated from the lower edge 21a in the front-rear direction. That is, the lower end louver 22 </ b> A in this example is separated forward from the lower edge 21 a of the exhaust port 21. A gap is formed between the outer edge 22b of the lower end louver 22A and the lower edge 21a of the exhaust port 21. The case 20 has an air flow path S2a below the lower end louver 22A. As will be described in detail later, the case 20 has a bottom wall portion 23 constituting the bottom portion thereof. The bottom wall portion 23 is positioned downward from the lower end louver 22A, and an air flow path S2a is formed between them. The air flow path S <b> 2 a communicates with the outside of the case 20 through between the lower end louver 22 </ b> A and the lower edge 21 a of the exhaust port 21. Thereby, the exhaust efficiency of case 20 can be improved. The peripheral edge of the exhaust port 21 in this example is fitted inside the opening 60b of the housing 60 as described above. Therefore, the air flow path S <b> 2 a communicates with the outside of the housing 60.

  As described above, the lower end louver 22A is separated from the lower edge 21a of the exhaust port 21 in the direction in which the exhaust port 21 is opened (front-rear direction). That is, the lower end louver 22A is located at substantially the same height as the lower edge 21a of the exhaust port 21. Therefore, exposure of the power supply circuit through the exhaust port 21 can be suppressed. The lower end louver 22A in this example overlaps with the lower edge 21a of the exhaust port 21 in the front-rear direction, as shown in FIG. That is, the straight line along the front-rear direction passing through the lower edge 21a also passes through the lower end louver 22A. Therefore, it is possible to reliably prevent the power circuit board 11 from being exposed between the lower end louver 22A and the lower edge 21a. In this example, the outer edge 22 b of the lower end louver 22 </ b> A is located at substantially the same height as the lower edge 21 a of the exhaust port 21 and is separated from the lower edge 21 a toward the inside of the case 20.

  The lower end louver 22A has a shape different from that of the other louvers 22, and accordingly, a distance D1 from the bottom wall portion 23 of the case 20 located below the lower end louver 22A to the lower end louver 22A is increased. Specifically, the vertical width of the lower louver 22A at the outer edge 22b is smaller than the vertical width of the other louvers 22 at the outer edge 22b. In other words, the lower end louver 22A has a shape in which the lower portion of the outer edge 22b is cut when compared to the other louvers 22. Thereby, the width | variety of the up-down direction of air flow path S2a can be enlarged, and exhaust efficiency can further be improved.

  As shown in FIG. 6, the plurality of louvers 22 includes an upper end louver 22B as one of them. The upper end louver 22 </ b> B is a louver positioned at the upper ends of the plurality of louvers 22. The case 20 has an air flow path S3a on the upper side of the upper end louver 22B. The case 20 has an upper wall portion 24 that faces the above-described bottom wall portion 23. The upper end louver 22B is located away from the upper wall portion 24, and a gap between the upper wall portion 24 and the upper end louver 22B functions as the air flow path S3a. The air flow path S3a communicates with the outside of the case 20 through the space between the upper end louver 22B and the upper portion (that is, the upper edge 21b) of the peripheral edge of the exhaust port 21.

  The upper end louver 22B is located away from the upper edge 21b in the front-rear direction. That is, the upper edge 21b is located at substantially the same height as the upper end louver 22B. Therefore, exposure of the power circuit board 11 through the air flow path S3a can be effectively suppressed. As shown in FIG. 6, the upper end louver 22B in this example overlaps with the upper edge 21b of the exhaust port 21 in the front-rear direction. Therefore, it is possible to reliably prevent the power supply circuit board 11 from being exposed between the upper end louver 22B and the upper edge 21b of the exhaust port 21. Further, the upper end louver 22 </ b> B is located inside the case 20 with respect to the upper edge 21 b of the exhaust port 21. In other words, the upper edge 21 b is located behind the upper end louver 22 </ b> B and the other louvers 22. As a result, the gap between the lower end louver 22 </ b> A and the lower edge 21 a of the vent 21 is covered with the upper wall portion 24. As a result, dust and the like can be prevented from entering through the gap.

  As shown in FIG. 4, the case 20 of this example has an upper case 20A and a lower case 20B. The upper case 20A and the lower case 20B are combined in the vertical direction. In this example, a plurality of mounting holes 20a and 20b are formed in the outer peripheral portion of the upper case 20A and the outer peripheral portion of the lower case 20B, respectively, and the upper case is formed by screws (not shown) fitted in the mounting holes 20a and 20b. 20A and lower case 20B are fixed to each other. In this example, the louver 22 and a support wall portion 26 described later are provided in the upper case 20A.

  The lower case 20 </ b> B has the above-described bottom wall portion 23 that constitutes the bottom portion of the case 20. As shown in FIG. 6, the air flow path S2a described above is formed between the bottom wall portion 23 and the lower end louver 22A. The bottom wall portion 23 has an inclined portion 23a. The inclined portion 23 a is inclined toward the lower edge 21 a of the exhaust port 21. In this example, the lower edge 21 a of the exhaust port 21 is located above the bottom wall portion 23, and the inclined portion 23 a extends obliquely upward toward the lower edge 21 a of the exhaust port 21. According to the inclined portion 23a, the air flow in the air flow path S2a can be smoothed, and the exhaust efficiency can be further improved.

  20 A of upper cases have the upper wall part 24 which opposes the bottom wall part 23 and comprises the upper surface of the case 20 (refer FIG. 4). As shown in FIG. 6, the power supply circuit board 11 is disposed below the case 20. The power circuit board 11 is separated from both the bottom wall portion 23 and the top wall portion 24. The power circuit board 11 is supported by ribs formed on the bottom wall portion 23, for example. Therefore, an air flow path S2 is formed between the power circuit board 11 and the bottom wall portion 23, and an air flow path S3 is formed between the power circuit board 11 and the upper wall portion 24. The air flow path S2 continues to the above-described air flow path S2a formed below the lower end louver 22A. Thereby, the power supply circuit board 11 can be effectively cooled by the air flowing under the power circuit board 11. In this example, the power supply circuit board 11 is located at substantially the same height as the lower end louver 22A. In other words, the power supply circuit board 11 and the lower end louver 22A are arranged in the front-rear direction. The electronic components constituting the power supply circuit are mounted on the upper surface of the power supply circuit board 11. Those electronic components are cooled by the airflow of the air flow path S3 formed between the power circuit board 11 and the upper wall portion 24.

  As shown in FIG. 4, an exhaust port 25 smaller than the above-described exhaust port 21 is formed in the lower case 20 </ b> B of this example. The bottom wall portion 23 is formed with a concave portion 23 b that extends in the left-right direction and is connected to the exhaust port 25. The recess 23b constitutes an air flow path connected to the exhaust port 25. The power circuit board 11 can be more effectively cooled by the air flowing through the air flow path.

  As shown in FIG. 6, the air flow path S3a described above is formed between the upper wall portion 24 of the case 20 and the upper end louver 22B. The upper wall portion 24 is connected to the upper edge 21 b of the exhaust port 21. That is, the rear edge of the upper wall portion 24 functions as the upper edge 21 b of the exhaust port 21. The upper wall portion 24 is inclined along the upper end louver 22B. That is, the upper wall portion 24 extends obliquely rearward and downward like the upper end louver 22B. Therefore, the air flow in the air flow path S3a can be smoothed.

  As shown in FIG. 6, the upper wall portion 24 protrudes rearward larger than the bottom wall portion 23. That is, the rear edge of the upper wall portion 24 (the upper edge 21b of the exhaust port 21) is located behind the rear edge of the bottom wall portion 23 (the lower edge 21a of the exhaust port 21). The rearmost portion of the upper wall portion 24 is located obliquely above the gap between the lower end louver 22A and the lower edge 21a of the exhaust port 21. As a result, dust and the like entering the case 20 from the gap can be suppressed by the rearmost portion of the upper wall portion 24.

  As shown in FIG. 6, the distance W1 between the upper wall portion 24 and the upper end louver 22B is larger than the distance W2 between the other two louvers 22 adjacent to each other. Thereby, air can be efficiently discharged from the case 20. That is, the air heated by passing through the heat sinks 52 and 53 flows through the upper part of the case 20. Therefore, the air can be efficiently discharged from the case 20 by increasing the distance W1 between the upper wall portion 24 and the upper end louver 22B.

  In this example, the distance W3 between the upper end louver 22B and the lower louver 22 is also larger than the distance W2. Therefore, the air discharge efficiency can be further improved. Note that the upper end louver 22 </ b> B extends rearward larger than the other louvers 22. Thereby, it is possible to suppress the power circuit board 11 from being exposed between the upper end louver 22B and the lower louver 22 while increasing the distance W3.

  As shown in FIG. 4, a plurality of support wall portions 26 are formed inside the exhaust port 21 so as to stand in the vertical direction. The louver 22 is supported by the support wall portion 26. The plurality of support wall portions 26 are arranged at intervals in the left-right direction. Each louver 22 is formed between two adjacent support walls 26. The support wall portion 26 protrudes toward the edges 21 a and 21 b of the exhaust port 21 (that is, toward the outside of the case 20) beyond the outer edge 22 b of the louver 22. That is, as shown in FIG. 6, the rear edge 26 a of the support wall portion 26 is located closer to the edges 21 a and 21 b of the exhaust port 21 than the outer edge 22 b of the louver 22. Thereby, the strength of the exhaust port 21 can be improved. Specifically, the strength of the case 20 against the force acting from the upper side of the case 20 can be improved. The lower end of the support wall portion 26 is in contact with the bottom wall portion 23. The lower end of the support wall portion 26 in this example is in contact with the inclined portion 23 a of the bottom wall portion 23.

  As shown in FIGS. 4 and 6, the rear edge of the bottom wall portion 23 of the lower case 20 </ b> B is formed with a protruding portion 23 c that protrudes downward and is positioned inside the lower housing 62. On the other hand, the lower housing 62 is formed with an engaging portion 62b into which the protruding portion 23c is fitted. The engaging part 62b is engaged with the protruding part 23c so as to be restricted from moving backward with respect to the protruding part 23c. When the force which pinches | interposes the rear part of the electronic device 1 in an up-down direction acts, the rear wall 62d of the lower housing 62 may incline back. Such engagement of the rear wall 62d of the lower housing 62 is restricted by the engagement of the engaging portion 62b with the protruding portion 23c.

  As described above, the power supply inlet 12 is connected to the power supply circuit board 11. The power inlet 12 of this example is supported by the case 20 so that the displacement with respect to the case 20 is possible. In this example, as shown in FIG. 4, the lower case 20 </ b> B has a box-shaped storage portion 20 c that stores the power inlet 12. The accommodating portion 20c has a size that allows the power inlet 12 to move inside thereof. Specifically, the accommodating portion 20 c in this example has a width in the left-right direction larger than that of the power inlet 12. The accommodating portion 20c in this example is a box shape whose upper side and rear side are open. The power inlet 12 is put into the accommodating part 20c from the upper side.

  The position of the power inlet 12 is defined by the lower housing 62. FIG. 7 is a plan view of the main part of the lower housing 62. In the figure, the power supply inlet 12 positioned by the lower housing 62 is schematically shown.

  The power inlet 12 is partially located outside the accommodating portion 20 c, and the portion located outside the power inlet 12 is positioned by the lower housing 62. In this example, as shown in FIG. 5, the rear portion 12b of the power inlet 12 protrudes rearward from the accommodating portion 20c. The lower housing 62 has the recessed part 62a which comprises the opening 60b in which the exhaust port 21 fits as mentioned above (refer FIG. 3). Furthermore, the recessed part 62c in which the rear part 12b of the power supply inlet 12 fits inside is formed in the edge of the recessed part 62a (refer FIG.3 and FIG.7). The position of the power inlet 12 in the left-right direction is defined by the edge of the recess 62c. As shown in FIGS. 4 and 7, ribs 12 c are formed on the rear portion 12 b of the power inlet 12 so as to protrude in the right direction and the left direction, respectively. On the other hand, the lower housing 62 is formed with ribs 62e and 62f that sandwich the ribs 12c in the front-rear direction. The ribs 62e and 62f define the position of the power inlet 12 in the front-rear direction. As described above, by defining the position of the power inlet 12 not by the case 20 but by the housing 60, the positioning of the power inlet 12 with respect to the housing 60 can be suppressed, and a gap around the power inlet 12 can be prevented. . The vertical movement of the power inlet 12 is restricted by the lower edge of the lower end louver 22A formed on the upper case 20A (that is, the outer edge 22b described above) and the bottom of the housing portion 20c.

  As described above, the case 20 has the exhaust port 21 that opens toward the rear side of the case 20. The exhaust port 21 is provided with a plurality of louvers 22 that are arranged at intervals in the vertical direction and are inclined with respect to the front-rear direction. The edge of the exhaust port 21 has a lower edge 21a at a part thereof. The lower end louver 22 </ b> A located at the lower end among the plurality of louvers 22 is separated in the front-rear direction from the lower edge 21 a of the exhaust port 21 toward the inside of the case 20. An air flow path S2a is formed below the lower end louver 22A. The air flow path S <b> 2 a communicates with the outside of the case 20 through between the lower end louver 22 </ b> A and the lower edge 21 a of the exhaust port 21. According to this structure, since air can be discharged from the air flow path S2a, the exhaust efficiency can be improved. Further, it is possible to prevent the power supply circuit board 11 from being exposed through the air flow path S2a.

  The lower end louver 22A is positioned so as to overlap the lower edge 21a of the exhaust port 21 in the front-rear direction. According to this, it can suppress more effectively that the power supply circuit board 11 is exposed through air flow path S2a.

  The edge of the vent 21 has an upper edge 21b. An air flow path S3a is formed above the upper end louver 22B located at the upper end of the plurality of louvers 22. The upper end louver 22B is located inside the case 20 with respect to the upper edge 21b, and is separated from the upper edge 21b of the vent hole 21 in the front-rear direction. According to this, it is possible to suppress the power circuit board 11 from being exposed through the air flow path S3a while further improving the exhaust efficiency.

  The power circuit board 11 is disposed away from both the bottom wall portion 23 and the upper wall portion 24. According to this, since the air flow is formed on both the upper side and the lower side of the power circuit board 11, the cooling performance for the power circuit board 11 can be improved.

  Further, the upper wall portion 24 protrudes greatly toward the rear side of the case 20 as compared with the bottom wall portion 23. Therefore, dust and the like can be prevented from entering through the gap between the lower end louver 22A and the lower edge 21a of the exhaust port 21.

  In addition, the housing 60 is formed with an opening 60b in which the periphery of the exhaust port 21 of the case 20 fits inside. Thereby, the exhaust efficiency of case 20 can further be improved.

  The exhaust port 21 is provided with a support wall portion 26 that stands in the vertical direction and supports the plurality of louvers 22. The support wall portion 26 extends beyond the plurality of louvers 22 toward the periphery of the exhaust port 21. According to this, the strength of the exhaust port 21 can be improved.

  The present invention is not limited to the electronic device 1 described above, and various changes may be made.

  For example, the direction in which the exhaust port 21 opens is not necessarily limited to the rear, and may open to the right or left of the case 20.

  Further, the upper end louver 22 </ b> B does not necessarily have to extend greatly compared to the other louvers 22.

  Further, when the size of the exhaust port 21 is small, the support wall portion 26 is not necessarily provided.

  There may be no gap between the power circuit board 11 and the bottom wall portion 23 of the lower case 20B.

  DESCRIPTION OF SYMBOLS 1 Electronic device, 3 Circuit board, 10 Power supply unit, 11 Power supply circuit board, 12 Power supply inlet, 20 Case, 20A Upper case, 20B Lower case, 22 Louver, 22A Lower end louver, 22B Upper end louver, 26 Support wall part, 50 Cooling Unit, 51 Cooling fan, 54 Cover, 60 Housing, S2a, S3a Air flow path.

Claims (7)

A case for housing a power circuit board;
A vent formed in the case and open in a first direction toward the outside of the case;
Provided in the vent and arranged in a second direction intersecting the first direction with an interval, each inclined with respect to the first direction and toward the outside of the case A plurality of louvers inclined to one side of the direction;
A first edge located on one side of the second direction that is part of an edge of the vent;
A louver located at one end of the plurality of louvers in the second direction, located on the inner side of the case than the first edge of the vent, and A first end louver away from the first edge in the first direction;
An air flow path in the case, formed on one side in the second direction with respect to the first end louver, and the first edge portion and the first end of the vent hole A first air flow path communicating with the outside of the case through and between the louvers;
An electronic device comprising: The electronic device according to claim 1,
The first end louver is positioned so as to overlap the first edge of the vent in the first direction;
An electronic device characterized by that. The electronic device according to claim 1 or 2,
A second edge located on the other side of the second direction, which is another part of the edge of the vent;
A louver located at the other end of the plurality of louvers in the second direction, located inside the case relative to the second edge of the vent, and A second end louver spaced in the first direction from two edges;
An air flow path in the case, further comprising a second air flow path formed on the other side in the second direction with respect to the second end louver,
An electronic device characterized by that. The electronic device according to claim 1,
The case is located on a side opposite to the first wall portion in the second direction, and a first wall portion that forms the first air flow path between the case and the first end louver. A second wall,
The power circuit board is located away from both the first wall and the second wall;
An electronic device characterized by that. The electronic device according to claim 4,
The second wall portion protrudes greatly toward the outside of the case as compared to the first wall portion.
An electronic device characterized by that. The electronic device according to claim 1,
A housing for housing the case;
The housing is formed with an opening into which the edge of the vent of the case fits.
An electronic device characterized by that. The electronic device according to claim 1,
The vent is provided with a support wall portion that stands in the second direction and supports the plurality of louvers,
The support wall portion protrudes beyond the plurality of louvers toward the outside of the case.
An electronic device characterized by that.

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